New approach to analog filters and group delay equaliser transfer function design

The starting point for filters and group delay equalisers design is the appropriate solution of the approximation problem. Through the presented technique is possible to design a transfer function standard even no standard filters with respect to their poles and zeros quality and group delay responses. The technique was also used for transfer function design of group delay equaliser. In this case there were prescribed requirements on group delay response and quality of poles and zeros as well. To solve these large constraint problems, modifying Differential Evolution (DE) is used, as an effective way for penalty function minimisation